Plate-casting machine.



G. H. PBTTIGREW. PLATE CASTING MACHINE.

APPLIOATION FILED SEPT. 30, 1912.

1,072,1 58. Patented Sept. 2, 1913.

2 BHBBTS-SHEET 1.

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, COLUMBIA PLANOOIMPH CD.,WA$N|NOTON. uc

C. H. PETTIGRBW. PLATE CASTING MACHINE. APPLICATION FILED SEPT 30, 1912.

1,072,158. Patented Sept. 2, 1913.

2 SHEBTSSHEET 2.

UNETEE) CHAR-LES HENRY PIETIIGRLEVJ. O33 IIIAYES,

PATENT @FFKQE.

ENtZtlliA'ND, ASSIGNOR TO THE GOSS PRINT- ING PRESS COMPANY, 011' CHICAGO, ILLINUIS, A CORPUIULTION OF ILLINOIS.

PLATE-CASTING I-ILACJI'TINE.

remiss.

Application filed September To (/1 ir/ioin 2/ may mare/'12.

lie it known that l tlnainins llnnnv ln'r- 'rionnw, a citizen of the lllnited titates ot iikmeriea. residing at iliayes, in the county of iviiddlesex, i lnglanih have invented new and useful Improvements in Plate-(lasting Illaehines, ot \vhieh the following is a speei ti ation.

This invention relates to maehines 't'or asting St'Lttf3t \'1)Q plates tor use in rotary rylinder printing presses in whieli the matrix holder or drag is movable with respeet to the rope by means of suitable handles. so that atter the stereotype plate has been east, preferably in a vertiral position, the drag may be moved into a horizontal position tor the purpose (it conveniently removing the stereot yqie plate tllere't'rom.

,iteeording to this invention the trunnion rollers by whieh the drag is supported upon the simporting surtares and the guiding rollers which eotipe'ate with the guiding surtaees to ett'eet a turning (it the drag into horizontal position are so :11 'anged that the guiding surtaees ean be mad as eontinuations of the supporting surtaees, thus eonsiderably simplifying the eonstrurtion ot the machine. For this purpose the trunnion rollers and the guiding rollers are so situated on the drag that a line joining their centers, lies in a horizontal plane when the drag is in its vertieal position. "he supporting and guiding surtamis in the side frames of the maehine may be in the form of slots so shaped. that they are horizontal at their upper part and terminate at their out- "ard or rearward ends in downwardly (curved portions. The distanee apart ot the said trunnion rollers and guiding rollers is such, and the eurvature ot the guiding slots so ehosen, that when the drag is moved away from the eope both the trunnion rollers and the guiding rollers will travel in a. horizontal direction on the si'ipporting snrtaee until the guiding rollers reaeh the downwardly curved portions of the slots, whereupon the drag will. be caused to turn about the axis of the trunnion rollers while the latter eontinue to move along the horizontal portion of the slots, the turning movement (it the drag continuing until the guiding rollers reach the ends of the downwardly eurved portions ol the said slots and bring the drag to rest in its horizontal position,

In order that the said invention may be Specification of Letter: Patent.

lta'trnted Sept. 75. 15H :3.

"" Serial No. 723,233.

rlearly understood and readily rarried into etleet. it will desrri'oe the same more fully with re'terenoe to the aeeompanying draw ngs in whirh:-

l' ignre i is a side elevation of the machine showing the drag in the vertieal or elosed position i. o. the position in \vhieh the stereotype plate is east. Fig. 2 is an end view of the maehiin as seen 'trom the right of Fig. l, and Fig. 3 is an end view similar to Fig. 2 but shows the drag in the horizontal or open position 2'. o. the position in whieh the stereotype plate is removed. Fig. t is a eentral vertiral seetion through the drag.

A is the eope or stationary part of the mold and i5 is the (l ag. l) indieates a (irrular plate loosely seated in the lower end of the drag; the upper beveled edge of which forms the bottom wall of the easting box. indirates handles mounted on said plate B. i

The eope is mounted on the base A. \vhieh earries the vertiral Side 11111080, bolted together by the transverse members These side 'l'rames are formed with the slots o (1 whieh eonstitute the supporting and guiding surtares tor the trunnion rollers u and the guiding rollers u. The trunnion rollers (L are adapted to travel along the horizontal portion r (it the said slots and the guiding rollers u. are earried at the extremities ot braekets or arms (1? extending rearwardly from the drag in a position in whirh the axis ot the said rollers (1/ lie in the same horizontal plane with the axis of the rollers a when the drag is in the vertical position.

The drag ii is held in its vertieal position relative to the eope by means ot brarkets i l and I fixedly mounted on transverselyextending shat'ts t and ll, respeetively. whirh are suitably ionrnaled upon the eope A. llaeh of these hrarltets is provided with a traiisversely-extending flange I adapted to engage i. stud or roller l in appropriate po sition. upon the drag 15 when said drag is roeked about its shat't as hereinalter deseribed.

l) indieates levers sha't t (it.

K-Ji indieate roek arms mounted upon the shalts (t and li respeetively, ronneet'ed at their outer ends by a link M. whereby said shafts and therefore the braelcets E and.

mounted upon the J are free to move to the right in said figure.

At any time when the drag B is in the vertical position shown in Fig. 1, which posi tion it can assume fully only when the levers D have been turned to their lowered position, the drag canof course be locked tightly against the cope A by a stroke of the levers D to the position shown in that figure, the studs J being engaged by the flanges I of the brackets.

In order to turn the drag B into the hori- Zontal or open position, a pull is exerted thereon rearwardly by means of the" handles 6 whereby the rollers a a are caused to travel along the horizontal portion 0 of the slots in the side frames C until the guiding rollers a enter the curved portion of the said slots whereupon these rollers are caused to descend in the curved portion of the slots and in so doing cause the drag to be turned about the axis of the trunnion rollers a into the posit-ion shown by the dotted lines in Fig. 1. From this position the drag may be returned to the vertical position by exerting a pull upon the handles Z) thereby causing similar movements to occur in the reverse order to that above described.

What I claim and desire to secure by Letters Patent of the United States is 1. In a plate casting machine, the combination of a frame, a cope mounted therein, and a drag provided with guiding means and with supporting means, said frame comprising guides with which the guiding means of said drag have sliding engagement and comprising also supports with which the supporting means of said drag have sliding engagement, said guides and said supports being continuations of each other.

2. In a machine for casting stereotype plates and the like, the combination with the cope, the movable matrix holder or drag andthe trunnion rollers and guiding rollers on said drag, of surfaces for guiding and surfaces for supporting said rollers, so disposed relatively to each other that the guiding surfaces are continuations of the sup porting surfaces.

3. In a machine for casting stereotype plates and the like, the combination with the cope, themo-vable matrix holder or drag and the trunnion rollers and guiding rollers on said drag, of side frames having guiding and supporting surfaces for said rollers, made in the form of slots which are horizontal at their upper parts and terminate at their outward or rearward ends in down wardly curved portions so disposed relatively to each other that the guiding surfaces are continuations of the supporting surfaces.

t. In a machine for casting stereotype plates and the like, the combination with the cope, the movable matrix holder or drag and the trunnion rollers and guiding rollers on the said drag, of side frames having continuous guiding and supporting slots for said rollers and brackets extending rearwardly from the drag for carryingthe guiding rollers in a position in which their axis lies in the same horizontal plane with the axis of the trunnion rollers when the drag is in the vertical position.

In testimony whereof I aiiix my signature in presence of two witnesses.

CHARLES HENRY PETTIGREW.

itnesses O. J. WORTH, C. P. LIDDoN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

7 Washington, D. C. 

